I had a great time at Sathorn Tower. I stayed there for a month over Christmas and New Years.
The place was clean and tidy, exactly as described, 5 mins from the sky train/bus links and 15 mins walk from the northward river ferry. It has a great view from out of the balcony, loads of storage, good bathroom and a fan for keeping cool. I would bring an electric hot plate and saucepan for best experience. The host was very quick to respond and helpful.
As far as convenience is concerned, SennaFest supermarket (which has everything you could need food wise) and mall is 4 mins walk and Iconsiam is 15 mins. There is a food court at Iconsiam that is vast and can be a one stop visit to try lots of different typical Thai/Asian (street) food types. There are lots of good restaurants in the area and you can try authentic Thai on the opposite corner to SennaFest.
Great place to explore BK from. N.B I recommend buying an unlimited Data sim for travelling.
Definitely would stay there again 👍